Factors of Puvanesarajah et al That Affect Perioperative Transfusion in a Patient Undergoing Surgery for an Adult Spinal Deformity (ASD)

Patient selection: adult undergoing surgery to correct spinal deformity (adult spinal deformity, ASD) that involved 4 or more levels

Risk factors for intraoperative blood transfusion volume:

(1) 3 column (anterior, middle, posterior) osteotomy (complex surgery)

(2) preoperative hemoglobin < 11.5 g/dL

(3) prolonged operative times

Risk factors for postoperative blood transfusion (up to 10 days after surgery):

(1) history of smoking

(2) failure to use intraoperative antifibrinolytic drugs

(3) greater volume of intraoperative transfusion using blood salvage (0.39 unit increase per intraoperative unit)

(4) lower volume of allogeneic blood transfused (0.23 unit decrease per allogeneic unit)